Information box at bottom of post page is annoying and I want to get rid of it.

At the bottom of the view post (the reading page) of my blog "The Horsemaster", a box is displayed with the name of the blog, the wordpress URL and the name of the theme "Misty Look". When you hover your cursor over it, it underlines.
I cannot figure out how to get rid of it. I dislike it, and did not intentionally put it there. How do I get rid of it, and why is there in the first place??
Blog url: http://thehorsemaster.wordpress.com/

Thank you so much for your reply. I do not understand why businesses such as WordPress and Google insist on 'fixing' what is not broken. But since Microsoft does it with every iteration of Windows, perhaps it's merely a case of 'job justification" rather than a true improvement.
Thanks again, and I'll give your solution a try.
M!